Flour sifter



FIG. 1 is a perspective view of a flour sifter showing my new design.

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a side elevational view thereof, the other side being a mirror image of the side shown in FIG. 4.

FIG. 5 is a front elevational view thereof.

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a flour sifter, as shown and described. 